<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>1</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>
<style>
    .red{
        color: red;
    }
    .blue{
        color:blue;
    }
    .yellow{
        color: yellow;
    }
</style>
<body>
    <div id='root'>
        <div v-if='show'>computed:</div>
        <div v-else-if="show_elseif">computed2:</div>
        <div v-else>cv-else;</div>
        <hr>
        show: <br/>
        <div v-show="show2">show</div>
    </div>
    <script>
        let app = Vue.createApp({
            data() {
                return {
                    show:false,
                    show_elseif:true,
                    show2:true
                }
            },
           
        })

        let vm = app.mount('#root')
    </script>
</body>
</html>